The Motorola CITRUS WX455 is an entry-level smartphone and is manufactured from 25% post-consumer recycled plastic and will come with Android 2.1 and 7 home screens on board and will feature a 3" 320x240 pixel QVGA display, 3MP camera, Wi-Fi, EVDO Rev A, Bluetooth, 2GB microSD card pre-installed, and will also make use of the Microsoft Bing Search and Bing Maps. There is also something quite unusual on the CITRUS called a "Backtrack sensor" that is on the back of the phone next to the camera. It acts like an optical navigation pad, so you can move your finger around on it to control the cursor on the screen. It also has the option to be turned off.
The LG Cosmos Touch VN270 is an update to the Cosmos VN250. As the name implies, the Cosmos Touch will feature a 2.8" touchscreen on the front, similar to the enV Touch, through we're not sure yet if it will be capacitive-sensitive or resistive-sensitive. Also included is the sliding QWERTY keyboard, 1.3MP camera, 3.5mm headset jack, Bing search, Bluetooth, and a microSD memory card slot. There is also an updated music player, but it is unclear if it can be used in the background.
Lastly, the Samsung Zeal U750 is only a minor update to the Samsung Alias 2 U750 (notice both share the same model number). The Zeal is a bit darker in color on the front of the device, and will now come with Skype Mobile and will support 32GB microSDHC memory cards. But other than that, the rest of the features remain the same, such as the two displays, E-Ink keyboard, and 2MP camera.
So out of these phones, which are you most interested in?
Samsung Continuum User Manual (PDF) | 360 degree view
Motorola CITRUS User Manual (PDF) | 360 degree view
LG Cosmos Touch User Manual (PDF) | 360 degree view
Samsung Zeal User Manual (PDF) | 360 degree view
Motorola DROID PRO 360 degree view
Motorola DROID 2 Global White 360 degree view